Could hyperthreading be turned on for these machines? You will see better iteration times with hyperthreading turned off.
Why is this true?
Thanks!
From: "Marc Getty" <[EMAIL PROTECTED]>
Reply-To: The Great Internet Mersenne Prime Search list <[email protected]>
To: "'The Great Internet Mersenne Prime Search list'" <[email protected]>
Subject: RE: [Prime] Poor iteration times
Date: Mon, 7 Mar 2005 11:22:15 -0500
Could hyperthreading be turned on for these machines? You will see better iteration times with hyperthreading turned off.
-Marc, across town from you
------------------------------------------ Marc Getty [EMAIL PROTECTED] Instructional & Information Technology Temple University, College of Liberal Arts Cell: 215-962-5603 Fax: 215-204-3731 ------------------------------------------
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Stephan Grupp Sent: Monday, March 07, 2005 8:34 AM To: [email protected] Subject: [Prime] Poor iteration times
I know these questions are unanswerable, but I have a poorly performing computer and would appreciate some troubleshooting suggestions. I have several Dell Optiplex boxes running 34M exponents and get iteration times anywhere from .059 to .072. These are all 3GHz+ CPU's, 1GB RAM.
There is one outlier that is getting .122 iteration times. It has a 3.00 GHz P4 CPU. I have looked at the task list and Prime95 is getting 98% of the cycles. I have run adware and spyware removers. After a reboot, I will sometimes see a couple of iteration times of .076 or so, but it always goes back to >.12 quickly and I do not see these shorter iteration times with every reboot.
This seems slow to me. Any thoughts of what this could be due to, especially if task list is showing me P95 with all the CPU cycles? -steve
Stephan Grupp MD PhD Director, Stem Cell Biology Children's Hospital of Philadelphia Oncology/BMT ARC 902 3615 Civic Center Blvd. Philadelphia, PA 19104-4318 phone 215-590-2821 fax 215-590-9080
_______________________________________________ Prime mailing list [email protected] http://hogranch.com/mailman/listinfo/prime
_________________________________________________________________
Don�t just search. Find. Check out the new MSN Search! http://search.msn.click-url.com/go/onm00200636ave/direct/01/
_______________________________________________ Prime mailing list [email protected] http://hogranch.com/mailman/listinfo/prime
